深冬季节西葫芦播种时种子不同胚根长度对其出苗和幼苗生长的影响

The Effects of the Length of Radicle on Seedling Emergence and Seedling Growth of Summer Squash in Severe Winter

研究了深冬季节西葫芦播种时种子不同胚根长度对其出苗率以及幼苗生长的影响,共设6个处理,分别是处理①未发芽(干种子未浸种)、处理②未发芽(只浸种未催芽)、处理③种子露白(胚根刚刚露出)、处理④胚根长度小于种子长度50%、处理⑤胚根长度介于种子长度50%和种子长度之间、处理⑥胚根长度大于种子长度。结果表明,催芽可以使西葫芦种子早出苗、早齐苗、出苗率高,促进幼苗生长,提高幼苗质量。播种时未出芽的西葫芦种子(处理①和处理②)其出苗和幼苗性状均较差,处理⑤与处理⑥西葫芦各性状指标好,差异不显著,明显好于处理③和处理④。但处理⑥的西葫芦种子播种时胚根过长,大于种子的长度,在播种时容易碰断,因此深冬季节播种时胚根长度介于种子长度50%和种子长度之间(处理⑤)是西葫芦种子播种时最适宜的胚根长度。

The effects of different radicle lengths of summer squash seeds on the emergence rate and seedling growth in severe winter were studied.A total of 6 treatments were set up as follows:treatment①no germination(dry seeds without soaking),treatment②no germination(Only seed soaking without accelerating germination),treatment③radicle protrusion through the seed coat(radicle just exposed),treatment④radicle length<half of seed length,treatment⑤radicle length between half of seed length and seed length,treatment⑥radicle length>seed length.The results showed that the accelerating germination could make the summer squash seeds emerge early,had a high seedling rate,promote the growth of seedlings,and improve the quality of seedlings.The seedling and seedling quality of summer squash seeds that did not sprout(treatment①and treatment②)were poor.While treatment⑤and treatment⑥,the summer squash had good indexes of various traits,and the difference was not significant between treatment⑤and treatment⑥,which was obviously better than treatment③and treatment④.But the radicle of the summer squash seed of treatment⑥was too long when planting,which was longer than the length of the seed,and it was easy to break during planting.Therefore,the most suitable radicle length for seed planting of the radicle length was between half the seed length and the seed length in the severe winter season(treatment⑤).